Imperial Japanese military song - Aerial Hundred Days Festival 航空百日祭 

This video does not represent my view, I do not condone Japanese actions of WW2 and I do not support Japanese militarism.
航空百日祭 is a IJAAS (Army Air Force) song for the Army Air Academy. It was released in 1941. This song is about Hundred Days Festival, which is celebrated as 100 days away from graduation. Both the lyricist and the composer were enrolled in the school. Therefore, the main content of the lyrics is determination after graduation.
Translated and refined using explanation-lyrics from gunka.sakura.ne.jp/nihon/koukuu.htm